Attachment for safe knobs



Nov. 27, 1934. Hl w SRYGLEY 1,982,080

` ATTACHMENT FOR vSAFE KNOBS A Filed May 31, 1935 Harry S/"yjfey z-a'l s ATTORNEY Patented Nov. 27, 1934 PATENT* oFFICI-:i

14 Claims.

My invention relates to thev class of devices designedto befapplied toa safe, and especially to the combination dial or. knob thereof, which l vcomprise a frangible container of noxious gas, serving to protect' the combination against a'ttack and damage.

The object of my invention is to provide a protective coveringv attachment of this` class which is self-contained, requiring no alteration or adaptation of the safe andl its fittings, which may be attached readily to the combination dial, and when so attached will-resist allunauthorized attempts to remove the attachment, orv injure the combination Without breaking the container 1510i noxious gas; and to that end: my invention resides in the novel construction and arrange.- mentl of parts hereinafter described and-.particularly pointed outin the, claims.

Referring now to the' drawing, in which. like %v characters represent like parts.:

Fig. 1 is a verticali elevation of. my; devicein position on the safe door, the knob, 16, being shown in dotted lines, this elevation being partlyin section along the lines, 1-1 of Fig..2;

Fig. 2 is a side4 View; inr vertical section, of the safe door and combination dial with my device attached thereto; and

Fig. 3 is a sectional View of the. collar, 17, Vtaken on the line, 3-3`of Fig; 1.

In theA safeedoor; 11, there is the usual 'annu-` lar ridge, 12, on which the zerdmark is placed, andA within same the usual rotatable combination; dial. piece, 1 3, having theV numberA marks, 14, on the outer circular edge of the front sur- 315? face, and therknob, 16, having an; intermediate narrowedy portion, 15, as is usualin safes.v of, ordinary manufacture. y Surrounding andsecurely fastened tothe knob,

16, so aste turn therewith is the collar, 17, of my device. This collar has. inner and outerk cylindrical surfaces, the bottom or inward end, 18, which restsagainst the surface of the` dialbeing rounded,- or. beveled, in orderY that it may more readily fit snugly againstany dial piece,v since sthe front surfaces of dial pieces. of different manufacture vary in contour. The top or front4 endof the collar, 17, has an outwardly extending iiange, 19'. y Extending inwardly through tapped holes in 5g: the cylindricalportion of the collar, 17', are four setscrews, 21, disposedninety degrees apart, the axis off' eachI being set at an angle-with the bottom of the collar, which I 'nd should be from eleven to'lfteen degrees, the inner endsthereby being higher. These setscrews arescrewedin-v auf:

wardly until they bear against the narrowed portion, 15, of the knob, 16; centering'thefcollar,A 1-7, about the axis of the diallpiece1f3', at theV4 proper setting, or angular position, as herein# after shown. The thrust of the set; screws, 21', ggf; soadjusted, servesA to press the bottom, 18; of thecollar, 17, rmly against the front surface of the dial piece, 13, so thatrthe co1lar,.17}. and the rest of my device attached thereto, will4 rotate with the dial piece, 13, upon'fthe same axis.` @5f The set sorews,.21, when covered by the rest of the device, as hereinafter shown, are inaccessible from Without and can not be loosened.

To. provide for knobs of diierent' shape I place" a secondV series of tapped holes, 22, nearerI g'gl the base, 18, ofthe collar, 17, in which the-seti screws, 21, may beplaced when mounting my*y device-onv dial piecesrhaving such knobs.

Into theannular portiony ofthe collar; 17, I drillthree holes from` .the top of the collar, f spaced a vslightly unequal number of degrees apart. In each lof these holes is placed* a dowel pin, 23, each pressedfby'the spring, 24; upwardly beyond the top surface of* the collar,` 17. T-hese pins, 23, have one endy rounded, and the other u end' tapering to a point, andobviously may be' reversed at choice so that either end may be chosenffor the top. y Y v At equal angular distances in the same direction of rotation fromthe dowel pins, 23, I' tap holes through the flange, '19, to receivev the cap screws, 25, which have a short shoulder, 26, next`v tolthe slotted head, 27, but smaller in diameter. Asa' may be required for spacing, I placek shim washers, 28, of' larger outside diameter, under the shoulder, 26. y

On the collar, 17, rests the disk portion, 29, ofi' the drum, 31, being in` front of the front-or top surface of the collar, 17, -andhavi'ngl substantially the samevinside diameter as thev collar, 15T, the outer diameter being slightly greater, vso thatthe drum, `31, may cover the flange, 19',- the conical portion thereof aringawayvfrom the collar, 17, and extending' backV` toward the safe. 11n the disk portion, 29, are disposed holes, 32,' corresponding-to the dowel pins, 23, but of lesser diameter. At equal angular distances `from holes, 32, are the beginnings of slots, 33, ofsuch Width, radially, that they will slide over the shoulders, 26, ofcap screws, 25. These slots, 33,' being of equal length' along the arc, terminate in circular openings, 34, large enough to fit over the heads, 27, of cap screws, 25, at the same time, when bywturning the drum, 31', the slots,

y26, is slightly greater than 2 33, ride on the shoulders, 26, until the end of the slot, 33, is reached, at which point the dowel pins, 23, will click into the holes, 32. It will be noticed that the length of the shoulder, the thickness of the flat or disk portion, 29; and that the spacing shim washers, 28, serve to separate the disk portion, 29, from the collar, 17.

When the rounded ends of dowel pins, 23, are turned out, the drum, 31, will be held in position when they click, but may be turned when pressure is applied, the pins sliding enough to release the drum; but when the pointed endsof the pins are turned out, they serve to hold the drum firmly against all pressure that can be applied.

The outer surface of the conical portion ofY the drum, 31, is roughened by outwardly pressed punch marks, or eruptions, 35, scattered over the surface. This is done to promote adhesion of .the layer, 36, of Aplaster of Paris, or other suitable cement by which-the drum, 31,\is attached to the adjacent zone or portion of the concave surface o1, the back part, 37, of the glass container.

vThe glass container consists of two substantiallyhemispherical glass shells, the inner shell, 37,` being welded to the outer shell, 38, at the back edge, 39, where they join, leaving between. them ameniscus shaped chamber, 41, which is lled with noxious gas in liquid form, 42, through a sealable glass nipple, 43, located at the pole of the outer shell, 38.

The glass container overlies the knob, 16, collar, 17, and drum, 31, extending` back nearly to the surface of the safe door, 11, its convex side being towards the front. The exterionsurface of the glass in the lowergzones is roughened bywelding thereto small bits of glass to form eruptions, 44, which likewise promote adhesion of thejcement. The second layer of cement, 45, serves tov attach the metallic bowl to the outer shell, 38, of the glass container.

@The metallic bowl consists kof a front short cylindrical portion, 46, for the base of the bowl, an intermediate flaring portion, 47, and anoutwardly; flaring rim, 48. The inner Ysurface of the flaring bowl portion, 47, is roughened by welding-thereto small bits of metal, 49, to promoteadhesion of thek cement layer, 45.

`'Ihe metallic bowl, glass container and drum,

` 31, constitute the cover of my device, as distinguished from the collar, 17, towhich they may be attached and locked -as shown. The rim, 48, when the cover is attached, extends as close to the safe door surface, 11, as is practicable for operation, leaving some slight clearance, the amountofjwhich may be adjusted by rvarying the-shimfwasher l28. i

y ySincevthe cover, and especially the rim, 48, when attached,covers the dial number marks, 14, and the annular ridge, 12, bearing the zero mark, the,rim,.48 is graduated with number marks, 51, vcorresponding to the number marks, 14, and a new zero mark, 52, corresponding to the old-zerogmark, is marked on the safe door surface,l 11, above the rim, v48. In order to readily adjustrny device in correspondence with the number marks, 14, I place a mark or marks on the collar, 17, indicating the angular position corresponding to the hundred mark of the marks, 5,1, on the rim, 48. Such a mark is shown at 53 as a groove on the inner surface offthecollar, 17.

,1, Inthe constructiony of my device I rst. attach the drum disk, 29, so

the gas filled glass container to the flaring bowl portion, 47, by means of the cement layer, 45; next I attach the drum, 31, to the inside of the glass container by means of the cement layer, 36, taking care to line the drum up with the rim, 48. I then insert the collar, 17, turning it to where the dowel pins, 23, click, having their rounded ends outward, and mark on it a hundred mark such as the groove, 53.

In applying my device toa safe the collar, 17, firmly onfthe safe dial piece, 13, using the mark, 53, to get the angular setting; then I put on the cover, letting the dowel pins, 23, click with their rounded ends; I then check the angular setting of markings, 51, with markn ings, 14, and try operating the combination with markings, 51, and if, necessary, remove the cover and readjust the collar.

VTo remove the cover from the collar, 17, at this time, it will be necessary to hold the dial piece, '13,'againstrotaton," which can be done with all safes of which I have'knowledge, especially when the door is open.

`I further in like manner adjust the thickness of the shim washers, 28, to secure proper clearance of the dial knob, 16, to provide uniform clearance between the bowl rim, 48, and safe door surface, 11, and to let the attachment spin properly. When the adjustments are completed the dial piece, 13, with my attachment fastened thereto and covering same, can be rotated as aA whole, and the combination .operated without difficulty.

For safes that have no way of holding the dial piece, 13, against turning when the safe isclosed the rounded ends of vdowel pins,p23, may be used permanently, the cover after they piece can be held. LOn such safes my device may be taken off whenever the safe door is open so that the dial piece can be held. 1 l

On' other safes it will be necessary to use the sharp endsof dowel pins, y23, when 4mounting the'cover: as a safeguard, and lonce so locked home it can not'be removedwithout breaking. When the glass container is broken the metal bowl may be removed by force, giving access to that the dowel pins, 23, may be released. Whenever such breakage` occurs a" new'cover may be put on the collar, making adjustments as above describedi What I claim as new, and desireto secure by Letters Patent of the United States of America, is: f

1. A protective covering for safe combination dial pieces, attached thereto and rotatable therewith, the attaching means being within i the cover, and having a frangible container of noxious gas disposed Within the cover and attached thereto and conforming to the inner surface thereof. o Y

2. Aprotective covering .for safecombination dialpieces, attached thereto and rotatable therewith, the cover having radial markings for operating the combination, the vattaching means being within the cover, and having a' frangible containerof noxious gas so disposed withinthe cover as to break under attack.` -f

3. A protective covering for Asafe combination dial pieces, attached thereto and rotatable therewith, the cover having radial markings for operating the combination, the attaching means being within the cover and inaccessible from without, and having aV frangible container @of I rst adjust l as itwillbe impossible to remove. have, clicked unless the ,dialV noxious gas so disposed Within the cover as to break under attack.

4. A protective attachment for safe combination dial pieces, having a cover Within which there is disposed a frangible container of noxious gas conforming to the inner surface of the cover, a collar, means for attaching the collar rmly to the dial piece, such means being enclosed by the cover and inaccessible from Without, and locking means Within the cover for locking the cover to the collar.

5. A protective attachment for safe combination dial pieces, having a cover` in Which there is a frangible container of noxious gas, a collar, means for attaching the collar firmly to the dial piece, such means being enclosed by the cover and inaccessible from Without, and locking means Within the cover for locking the cover to the collar, the cover rotating with the dial piece and having radial markings for operating the combination.

6. A protective attachment for safe combination dial pieces, having a cover in which there is a frangible container of noxious gas, a collar, means for attaching the collar rmly to the dial piece, and locking means for locking the cover to the collar operated by turning one relatively to the other, both such attaching rand locking means being enclosed by the cover and inaccessible from Without.

7. A protective attachment for safe combination dial pieces, having a cover in which there is a irangible container of noxious gas, a collar, means for attaching the collar firmly to the dial piece, and locking means for locking the cover to the collar operated by turning one relatively to the other, both such attaching and locking means being enclosed by the cover and inaccessible irom Without, the cover rotating with the dial piece and having radial markings for operating the combination.

8. A protective attachment for safe combination dial pieces, having a cover in which there is a frangible container of noxious gas, a collar, means for attaching the collar firmly to the dial piece, and locking means for locking the cover to the collar operating automatically upon turning one relatively to the other, both such attaching and locking means being enclosed by the cover and inaccessible from without.

9. A protective attachment for safe combination dial pieces, having a cover in which there is a frangible container of noxious gas, a collar, means for attaching the collar firmly to the dial piece, and locking means for locking the cover to the collar operatingautomatically upon turning one relatively to the other, both such attaching and locking means being enclosed by the cover and inaccessible from Without, the cover rotating with the dial piece and having radial markings for operating the combination.

10. In a device of the class described, a collar firmly attached to the dial piece, a cover, engaging means holding the cover to the collar but permitting transverse motion, and locking means to lock against such transverse motion, lall such attaching, engaging and locking means being enclosed by the cover and inaccessible from without.

11. In a device of the class described, a collar firmly attached to the dial piece, a cover, engaging means holding the cover to the collar but permitting relative rotation, and locking means to lock against such relative rotation, all such attaching, engaging and locking means being enclosed by the cover and inaccessible from without.

l2. In a device of the class described, a collar firmly attached to the -dial piece, a cover, engaging means holding the collar to the cover but permitting relative rotation, and spring pressed pins alining with corresponding depressions for locking the cover to the collar, all such attaching, engaging and locking means being enclosed by the cover and inaccessible froml Without.

13. In a device of the class described, a collar firmly attached to the dial piece, a cover, engaging means holding the cover to the collar' consisting of cap screws in one sliding in arced. slots in the other, and spring pressed pins alining With corresponding depressions for locking the cover and collar against relative turning, all. such attaching, engaging and locking means being enclosed by the cover and inaccessible from without.

14. In a device of the class described, a collar firmly attached to the dial piece, a cover, engaging means holding the collar to the cover but permitting relative rotation, and spring pressed pins alining with corresponding depressions for locking the cover tothe collar, all such attaching, engaging and locking means being enclosed by the cover and inaccessible from Without, the cover rotating with the dial piece and having radial markings for operating the combination.

HARRY W. SRYGLEY. 

